rtc: digicolor: set range

While the range of REFERENCE + TIME is actually 33 bits, the counter
itself (TIME) is a 32-bits seconds counter.

Acked-by: Baruch Siach <[e-mail]>
Signed-off-by: Alexandre Belloni <[e-mail]>

drivers/rtc/rtc-digicolor.c

···
 	platform_set_drvdata(pdev, rtc);
 
 	rtc->rtc_dev->ops = &dc_rtc_ops;
+	rtc->rtc_dev->range_max = U32_MAX;
 
 	return rtc_register_device(rtc->rtc_dev);
 }